Vaisala BAROCAP PTB330, Руководство пользователя

Страница: 109 / 139

Chapter 6 __________________________________________________ Calibration and Adjustment
VAISALA ______________________________________________________________________ 107
CHAPTER 6
CALIBRATION AND ADJUSTMENT
This chapter contains instructions for performing the calibration and
adjustment of the product.
The PTB330 is fully calibrated and adjusted as shipped from factory.
Calibration must be done always when there is reason to believe that the
device is not within the accuracy specifications.When defining the
calibration interval the long term specifications and the requirements of
the customer must be taken into consideration. Contact Vaisala Service
Centers for details. It is recommended that calibration and adjustment
should be carried out by Vaisala. See
Vaisala Service Centers on page
125 . Calibration and adjustment are carried out through the serial port
or with the optional display/keypad.
Pressure
The user can select a simple offset or a two-point offset and gain
adjustment and use the
LCP command for adjustment of the barometer
module. The MPCP command is used for the more sophisticated
multipoint correction capability at up to eight pressure levels. Check
first what linear corrections the transmitter is currently using before
attempting to readjust the barometer module. As the previous linear
corrections will disappear when new linear corrections are input, the
user has to take into account the previous linear corrections when
deciding about the new ones.